Have your Thanksgiving sweet potatoes gone bad? Learn how to tell, and find out how long sweet potatoes last when raw, cooked, refrigerated, or frozen.

By Gina Hamadey
Updated October 13, 2017

Do sweet potatoes go bad? Yes, indeed. How can you tell if a sweet potato has gone bad? Use your senses: Does your raw sweet potato smell strange? Is it wet or oozing or squishy or discolored or sprouting? If your answer is “Yes!” to any of the above, toss it! To avoid losing your sweet potatoes to spoilage, we’ve created a great guideline on how long sweet potatoes last and how to store them properly for best keeping.

How Long Sweet Potatoes Last When Raw

Stored on the counter, raw sweet potatoes will generally last for one to two weeks. If you have access to a cool, dark, dry area (similar to the root cellars of our ancestors), sweet potatoes can last about a month. To maximize the shelf life of a sweet potato, store at a cool room temperature, in a loosely covered bag or open-weave basket to allow for air circulation. Remember, as long as your raw sweet potato is firm and not sprouting, it’s still fresh.

How Long Sweet Potatoes Last When Cooked

Cooked sweet potatoes generally keep for a few hours at room temperature, and three to five days in an airtight container and refrigerated.

How Long Sweet Potatoes Last in the Refrigerator

Should you refrigerate raw sweet potatoes? Whole, raw sweet potatoes should not be refrigerated, as doing so can affect their taste and make them hard in the center. How long do raw sweet potatoes last after they've been cut? If you cover with cold water and refrigerate, they last about a day.

How Long Sweet Potatoes Last in the Freezer

Can you freeze sweet potatoes? Raw sweet potatoes do not freeze well. Cooked sweet potatoes, however, freeze beautifully. You could roast, boil, or microwave them, mash the flesh, and then mix with a squeeze of lemon to prevent discoloration. Store in airtight containers or heavy-duty freezer bags.

How long do sweet potatoes last once they have been cooked and stored in the freezer? Frozen cooked sweet potatoes will keep well for up to six months.